Nb和N对Fe-Cr13-C堆焊层金属耐磨性能的影响  

Effect of niobium and nitrogen on the wear res-istance of Fe-Cr13-C hardfacing alloy

作　　者：冒志伟 杨可[1,2] 李嘉琪 徐亮 王秋雨 包晔峰 MAO Zhiwei;YANG Ke;LI Jiaqi;XU Liang;WANG Qiuyu;Bao Yefeng(College of Mechanical and Electronic Engineering,Hohai University,Changzhou 213022,China;Nantong Ocean and Coastal Engineering Research Institute,Hohai University,Nantong 226019,China)

机构地区：[1]河海大学机电工程学院,江苏常州213022 [2]南通河海大学海洋与近海工程研究院,江苏南通226019

出　　处：《电焊机》2020年第8期31-34,I0004,共5页Electric Welding Machine

基　　金：国家重点研发计划资助项目(2017YFE0100100);国家自然科学基金(51101050);南通市基础科学研究项目(JC2019063);河海大学大学生创新创业训练计划项目(2020102941530)。

摘　　要：在Fe-Cr13-C耐磨堆焊焊条药皮中加入Nb和N进行合金化并进行堆焊试验。采用光学显微镜、扫描电镜观察堆焊层金属的显微组织;利用滑动摩擦磨损试验机测试堆焊层金属的耐磨性能,研究Nb和N对Fe-Cr13-C堆焊层金属耐磨性能的影响。结果表明:堆焊层金属中铌和氮的加入能细化马氏体,并且使析出相分布更未均匀,具有明显的细晶强化和析出强化作用,硬度提高约25%;使摩擦磨损磨痕最大深度减小约72%,平均磨痕截面积减小约81%,耐磨性能得到显著提高。Nitrogen and niobium were added into the coating of Fe-Cr13-C hardfacing electrode for alloying,and then the hardfacing test was performed.The microstructure of hardfacing layer metal was observed by optical microscope and scanning electron microscope.Moreover,the wear resist-ance property of hardfacing layer metal was tested by sliding friction wear tester,and the effect of niobium and nitrogen on the wear resistance property of Fe-Cr13-C hardfacing alloy metal was studied.The results show that the addition of niobium and nitrogen in the hardfacing layer alloy can refine martensite and make the precipitation phase distribu-tion more uniform.It has obvious fine grain strengthening effect and precipitation strengthening effect.The hardness of the hardfacing alloy increased by about 25%;the maximum depth of the wear scar reduced by about 72%,and the average cross-sectional area of wear scar reduced by about 81%.The wear resistance of the hardfacing alloy improves significantly.

关 键 词：合金化 堆焊 显微组织 耐磨性 

分 类 号：TG422.1[金属学及工艺—焊接]